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The GIGABYTE GAMING 1000GM PG5 (GP-GME1000GM PG5) is a fully modular 1000W ATX 3.1 power supply whose strongest case is its efficiency and T-Guard protection for the 12V-2×6 GPU cable. Tom’s Hardware’s 2026 review found Platinum-level certification and strong efficiency results, but described overall electrical performance as average for the class and the fan as very loud during sustained full-load operation in a hot environment. It is a compelling feature set, not an unqualified top performer.
What the GAMING 1000GM PG5 is—and what it isn’t
This is the GIGABYTE GAMING 1000GM PG5, product code GP-GME1000GM PG5. It is a 1000W, fully modular ATX 3.1 power supply. Tom’s Hardware also identifies it as PCIe 5.1-compliant and reports a native 12V-2×6 connector. Do not confuse it with Gigabyte’s similarly named UD1000GM PG5; they are distinct models. Gigabyte’s product page lists the GAMING model’s features, while Tom’s Hardware’s review covers the tested unit.
How to interpret its Gold and Platinum efficiency claims
Gigabyte’s product page labels the PSU 80 PLUS Gold and lists Cybenetics ETA Platinum certification. Tom’s Hardware reports that its reviewed sample had Platinum certifications from both CLEAResult’s 80 PLUS program and Cybenetics. These labels refer to certification programs; the measured results below are the review’s own efficiency tests, not a guarantee that every unit will produce exactly the same figures in every system.
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|---|---|
| Average across the nominal load range at 230 VAC, Tom’s Hardware testing, 2026 | 92.6% |
| Average across the nominal load range at 115 VAC, Tom’s Hardware testing, 2026 | 90.6% |
| Sustained 1000W output at 230 VAC, Tom’s Hardware testing, 2026 | 91.0% |
| Sustained 1000W output at 115 VAC, Tom’s Hardware testing, 2026 | 88.5% |
The different results at 115 VAC and 230 VAC show why a single efficiency figure is incomplete: the test voltage and load matter. The review’s measurements support the Platinum-level efficiency claim, while Gigabyte’s published 80 PLUS Gold branding remains part of how the product is presented.
#1 Best Overall
- Fully Modular PSU: Reliable and efficient, low-noise power supply with fully modular cabling, so you only have to connect the cables your system build needs.
- Intel ATX 3.1 Certified: Compliant with the ATX 3.1 power standard, supporting PCIe 5.1 platform withstands 2x transient power excursions from the GPU.
- Keeps Quiet: A 120mm rifle bearing fan with a specially calculated fan curve keeps fan noise down, even when operating at full load.
- 105°C-Rated Capacitors: Delivers steady, reliable power and dependable electrical performance.
- Modern Standby Compatible: Extremely fast wake-from-sleep times and better low-load efficiency.
What T-Guard does for the GPU cable
Gigabyte says T-Guard monitors the 12V-2×6 cable for abnormal heat buildup and cuts power to the GPU if it detects a risk. According to the manufacturer, the rest of the system can remain active only if the processor has integrated graphics and a display is connected to the motherboard; restoring GPU power requires a reboot. Gigabyte also describes the connector’s dual-color design as a visual cue for secure insertion.
T-Guard is a safeguard, not a substitute for properly seating and routing the power cable, and Gigabyte’s description does not establish that it prevents every possible connector fault. Its practical value is that it can respond to detected abnormal heat by shutting off GPU power rather than treating the cable as an unmonitored connection.
Rank #2
- 80 PLUS GOLD CERTIFIED Very high operating efficiency Pure Power 13 M 1000W is certified 80 PLUS Gold with an outstanding efficiency rating of up to 94.4%. The most compelling benefit: lower power consumption, consequently lower costs, and above all a cooler as well as quieter operation. Pure Power 13 M 1000W is always the correct choice for quiet systems and gaming PCs!
- FUTURE-PROOF YOUR SYSTEM Fulfills all ATX 3.1 specifications Pure Power 13 M 1000W is an ATX 3.1 PSU and comes with both native integration of the 12V-2x6 connector for next-generation PCIe 5.1 graphics cards, and 4 PCIe 6+2-pin connectors for support of current-gen GPUs. This makes the PSU extremely versatile and the perfect choice for powerful systems of today and the ones to come
- THE NEW STANDARD OF POWER For massive transient loads Pure Power 13 M offers 1000W of continuous power with one massive 12V rail. Even if the graphics card demands excessive power for a short time: Pure Power 13 M 1000W handles power excursions up to double its rated power with ease. This ensures reliable operation with the next generation of processors and graphics cards
- SEMI-PASSIVE ZERO-RPM COOLING Enjoy the silence While under low load, the fan turns off completely until its services are needed again for more demanding operations. This feature, combined with the reliable be quiet! fan and its airflow-optimized fan blades, make Pure Power 13 M 1000W exceptionally silent in all load scenarios
- HIGH-CLASS TECHNOLOGIES Rock-solid stability With its LLC topology Pure Power 13 M 1000W provides best-in-class voltage regulation and efficiency. That makes it perfect for building very quiet systems or upgrading gaming and media creation PCs
Fan noise and performance under load
Tom’s Hardware found that the fan stopped at loads up to about 30%—approximately 300W—and was barely audible up to 500W at room temperature. The review judged the temperature/noise balance good in ordinary conditions. That behavior changes when the PSU is pushed hard in a hot environment: under sustained heavy load, its fan became very loud and approached top speed at full load.
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The review characterized the unit’s other electrical performance as average for its class. It reported good minor-rail regulation and 1.3% regulation on the 12V rail; ripple remained within ATX limits but was not remarkable. The PSU’s case is therefore stronger on efficiency and T-Guard than on leading every electrical-performance measure.
Rank #3
- Fully Modular: Reliable and efficient low-noise power supply with fully modular cabling, so you only have to connect the cables your system needs.
- Cybenetics Gold-Certified: Rated for up to 91% efficiency, resulting in lower power consumption, less noise, and cooler temperatures.
- ATX 3.1 Compliant: Compliant with the ATX 3.1 power standard from Intel, supporting PCIe 5.1 and resisting transient power spikes.
- Native 12V-2x6 Connector: Ensures compatibility with the latest graphics cards with a direct GPU to PSU connection – no adapter necessary.
- Embossed Cables with Low-Profile Combs: Sleek, ultra-flexible embossed cables look great and make installing and connecting the RMx a breeze.
Fit, warranty, and review-time price
- Case clearance: The chassis is 150mm long. Tom’s Hardware notes that this may be tight in very compact cases, so check the PSU space and cable clearance in your specific case.
- Included hardware: The review described the bundle as sparse and noted that mounting screws were not included.
- Warranty: Gigabyte advertises a ten-year warranty, subject to region. Confirm the terms that apply where you live.
- Price context: Tom’s Hardware listed $170 at publication on September 27, 2026. That is a review-time price, not a current retail quote.
Is the Gigabyte 1000GM PG5 worth buying?
Consider it if you need a fully modular 1000W ATX 3.1 supply and place a high value on efficient operation and the manufacturer’s 12V-2×6 thermal safeguard. Its quiet fan behavior at the tested ordinary loads is also a plus. Look elsewhere if your priority is quiet operation during sustained high loads in a hot environment, or if you want a PSU that leads its class across electrical measurements rather than standing out chiefly for efficiency and protection features.
Tom’s Hardware named the Corsair RM1000x, MSI MAG A1000GL PCIE5, and Montech Century II 1050W as alternatives. Treat that as review-time comparison context: compare the exact revisions, present-day pricing, and availability before choosing. Be sure a listing is for the GAMING 1000GM PG5, GP-GME1000GM PG5—not the UD1000GM PG5.
Quick Recap
Best Value
- 【ATX 3.1】Built to ATX 3.1 specifications means the Toughpower GT 1000W is capable of handling up to 3x GPU power excursions and up to 2x total power excursions, while maintaining low load efficiency as well.
- 【Native 5.1 12V-2x6】Featuring a native PCIe 12V-2x6 cable capable of delivering up to 600W to meet power demands for modern GPUs.
- 【Perfect Fit】Great for systems that are low on space but not necessarily SFF in size the Toughpower GT is ideal thanks to its 140mm length and full modular cable set.
- 【Stylish Flexiblity】 The included Full Modular cable set now features flat cables with color matched connectors to provide an improvement in flexibility for routing and management.
- 【Cool and Quiet】Providing cooling is a hydraulic bearing 120mm fan tuned to provide good airflow and low noise, and for even less noise utilize the Smart Zero Fan mode.
Rank #4
- 80 PLUS GOLD CERTIFIED: Provides up to 92% high efficiency, reducing energy consumption and heat while ensuring stable power delivery for high-end systems.
- Fully Modular Design: The psu features fully modular soft dragon-pattern cables to minimize cable clutter, improve airflow, and enhance cooling efficiency for a cleaner, neater PC build.
- ATX 3.1 & PCIe 5.1 Ready: Compliant with ATX 3.1 and PCIe 5.1, supports up to 2x total power excursion and 3x GPU power excursion for stable high-performance power supply. Comes with a dual-color dragon-pattern 16-pin PCIe 5.1 cable with orange connector for easy and secure plug-in confirmation.
- 140MM FDB Fan with Smart Control: Larger 140mm fan design ensures quieter operation and superior heat dissipation. Smart fan control auto-sleeps at low load for silent usage and adjusts speed dynamically under high load for efficient cooling performance.
- Premium Components & Stable Design: Features 100% Japanese 105°C-rated capacitors for exceptional durability and stability. Paired with DC-DC & half-bridge resonant design to deliver higher efficiency, lower heat, quieter operation, and ultra-reliable power output.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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